[submodule] Upgrade common-superbuild.

The projects named python2 and python3 have been created to managed
the python major version we use. That is why we have added a python2
dependency to the lidarview project.

CMakeLists.txt

@@ -77,6 +77,7 @@ function (superbuild_find_projects var)
     pcap
     png
     python
+    python2
     pythonqt
     qt5
     zlib

Projects/paraview.cmake

@@ -6,7 +6,7 @@ if (Protobuf_FOUND)
   list(APPEND pv_cmake_options "-DVTK_USE_SYSTEM_PROTOBUF:BOOL=${VTK_USE_SYSTEM_PROTOBUF}" )
 endif()
 superbuild_add_project(paraview
-  DEPENDS qt5 python pythonqt
+  DEPENDS qt5 python python2 pythonqt
   DEFAULT_ON
   DEBUGGABLE
   CMAKE_ARGS

Projects/pythonqt.cmake

 superbuild_add_project(pythonqt
-  DEPENDS qt5 python
+  DEPENDS qt5 python python2
   CMAKE_ARGS
     -DBUILD_SHARED_LIBS:BOOL=ON
     -DPythonQt_QT_VERSION:STRING=${qt_version}

common-superbuild @ d6cbbd68

-Subproject commit 5d6ed8a9dba2ec0ee5737032f3aa230a177ca608
+Subproject commit d6cbbd6890bb45da6aa7f9068b37c2383f6f5b38